Letter tray riser



FIG. 1 is a top, left front perspective view of a letter tray riser showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a right side elevational view the left side being a mirror image thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a top, left front perspective view of a second embodiment of my new design; and,

FIG. 8 is a top, left front perspective view of a third embodiment of my new design. 

The ornamental design for a letter tray riser, as shown and described. 